Geologic history of the Blackbird Co-Cu district in the Lemhi subbasin of the Belt-Purcell Basin
Arthur A. Bookstrom, Stephen E. Box, Pamela M. Cossette, Thomas P. Frost, Virginia Gillerman, George King, N. Alex Zirakparvar
2016, GSA Special Papers (522) 185-219
The Blackbird cobalt-copper (Co-Cu) district in the Salmon River Mountains of east-central Idaho occupies the central part of the Idaho cobalt belt—a northwest-elongate, 55-km-long belt of Co-Cu occurrences, hosted in grayish siliciclastic metasedimentary strata of the Lemhi subbasin (of the Mesoproterozoic Belt-Purcell Basin). The Blackbird district contains at least...
Geology of the Greenwater Range, and the dawn of Death Valley, California—Field guide for the Death Valley Natural History Conference, 2013
J.P. Calzia, O.T. Ramo, Robert Jachens, Eugene Smith, Jeffrey Knott
2016, Open-File Report 2016-1064
Much has been written about the age and formation of Death Valley, but that is one—if not the last—chapter in the fascinating geologic history of this area. Igneous and sedimentary rocks in the Greenwater Range, one mountain range east of Death Valley, tell an earlier story that overlaps with the...
Estimating forest and woodland aboveground biomass using active and passive remote sensing
Zhuoting Wu, Dennis G. Dye, John M. Vogel, Barry R. Middleton
2016, Photogrammetric Engineering and Remote Sensing (82) 271-281
Aboveground biomass was estimated from active and passive remote sensing sources, including airborne lidar and Landsat-8 satellites, in an eastern Arizona (USA) study area comprised of forest and woodland ecosystems. Compared to field measurements, airborne lidar enabled direct estimation of individual tree height with a slope of 0.98 (R2 = 0.98)....
Coesite in suevites from the Chesapeake Bay impact structure
John C. Jackson, J. Wright Horton Jr., I-Ming Chou, Harvey E. Belkin
2016, Meteoritics and Planetary Science (51) 946-965
The occurrence of coesite in suevites from the Chesapeake Bay impact structure is confirmed within a variety of textural domains in situ by Raman spectroscopy for the first time and in mechanically separated grains by X-ray diffraction. Microtextures of coesite identified in situ investigated under transmitted light and by scanning electron microscope...
Megafloods and Clovis cache at Wenatchee, Washington
Richard B. Waitt
2016, Quaternary Research (85) 430-444
Immense late Wisconsin floods from glacial Lake Missoula drowned the Wenatchee reach of Washington's Columbia valley by different routes. The earliest debacles, nearly 19,000 cal yr BP, raged 335 m deep down the Columbia and built high Pangborn bar at Wenatchee. As advancing ice blocked the northwest of Columbia valley, several giant floods descended...
Geologic map of the Valdez D-1 and D-2 quadrangles (Mount Wrangell Volcano), Alaska
D.H. Richter, R. G. McGimsey, Keith A. Labay, M. A. Lanphere, R. B. Moore, C.J. Nye, D. S. Rosenkrans, G. R. Winkler
2016, Scientific Investigations Map 3351
Geologic Note Mount Wrangell (elev. 4,317 m) is the youngest and only active volcano in the Oligocene to Holocene-aged Wrangell volcanic field that extends from beyond the Alaska-Yukon border northwest through the Wrangell Mountains to the Copper River Basin. The volcano is a very large (900 km3) broad shield containing an...
U.S. Geological Survey response to flooding in Texas, May–June 2015
Jeffery W. East
2016, Fact Sheet 2016-3027
As a Federal science agency within the Department of the Interior, the U.S. Geological Survey (USGS) collects and disseminates streamflow stage and discharge information along with other types of water information as a major part of its Water mission area. Data collected at USGS streamflow-gaging stations (hereinafter referred to as...
Can the eastern red-backed salamander (Plethodon cinereus) persist in an acidified landscape?
Cheryl A Bondi, Colin M. Beier, Peter K Ducey, Gregory B. Lawrence, Scott W. Bailey
2016, Ecosphere (7)
Hardwood forests of eastern North America have experienced decades of acidic deposition, leading to soil acidification where base cation supply was insufficient to neutralize acid inputs. Negative impacts of soil acidity on amphibians include disrupted embryonic development, lower growth rates, and habitat loss. However, some amphibians exhibit intraspecific variation in...
The structure of genetic diversity in eelgrass (Zostera marina L.) along the North Pacific and Bering Sea coasts of Alaska
Sandra L. Talbot, George K. Sage, Jolene R. Rearick, Megan C. Fowler, Raquel Muñiz-Salazar, Bethany Baibak, Sandy Wyllie-Echeverria, Alehandro Cabello-Pasini, David H. Ward
2016, PLoS ONE (11)
Eelgrass (Zostera marina) populations occupying coastal waters of Alaska are separated by a peninsula and island archipelago into two Large Marine Ecosystems (LMEs). From populations in both LMEs, we characterize genetic diversity, population structure, and polarity in gene flow using nuclear microsatellite fragment and chloroplast and nuclear sequence data. An...
The source of groundwater and solutes to Many Devils Wash at a former uranium mill site in Shiprock, New Mexico
Andrew J. Robertson, Anthony J. Ranalli, Stephen A. Austin, Bryan R. Lawlis
2016, Scientific Investigations Report 2016-5031
The Shiprock Disposal Site is the location of the former Navajo Mill (Mill), a uranium ore-processing facility, located on a terrace overlooking the San Juan River in the town of Shiprock, New Mexico. Following the closure of the Mill, all tailings and associated materials were encapsulated in a disposal cell...
Magma transport and olivine crystallization depths in Kīlauea’s East Rift Zone inferred from experimentally rehomogenized melt inclusions
Robin M Tuohy, Paul J. Wallace, Matthew W. Loewen, Don Swanson, Adam J R Kent
2016, Geochimica et Cosmochimica Acta (185) 232-250
Concentrations of H2O and CO2 in olivine-hosted melt inclusions can be used to estimate crystallization depths for the olivine host. However, the original dissolved CO2concentration of melt inclusions at the time of trapping can be difficult to measure directly because in many cases substantial CO2 is transferred...
Geologic map of the Rio Rico and Nogales 7.5’ quadrangles, Santa Cruz County, Arizona
William R. Page, Christopher M. Menges, Floyd Gray, Margaret E. Berry, Mark W. Bultman, Michael A. Cosca, D. Paco VanSistine
2016, Scientific Investigations Map 3354
The Rio Rico and Nogales (Arizona) 1:24,000-scale quadrangles are located in the Basin and Range Province of southern Arizona, and the southern edge of the map is the international border with Sonora, Mexico. The major urban area is Nogales, a bi-national city known as “the gateway to Mexico.” Rocks exposed...
Notes on the origin of copromacrinite based on nitrogen functionalities and δ13C and δ15N determined on samples from the Peach Orchard coal bed, southern Magoffin County, Kentucky
Bruno Valentim, Manuel Algarra, Alexandra Guedes, Leslie F. Ruppert, James C. Hower
2016, International Journal of Coal Geology (160-161) 63-72
This paper represents the first attempt to show, by means other than just petrographic ones, that one type of macrinite, herein designated copromacrinite, may result from macrofauna feces. For that purpose a combination of coal petrography, X-ray photoelectron spectroscopy, and elemental-analysis continuous-flow isotope ratio mass spectrometry methods were used...
Perchlorate and selected metals in water and soil within Mount Rushmore National Memorial, South Dakota, 2011–15
Galen K. Hoogestraat, Barbara L. Rowe
2016, Scientific Investigations Report 2016-5030
Mount Rushmore National Memorial is located in the east-central part of the Black Hills area of South Dakota and is challenged to provide drinking water to about 3 million annual visitors and year-round park personnel. An environmental concern to water resources within Mount Rushmore National Memorial has been the annual...
Forest cover changes due to hydrocarbon extraction disturbance in central Pennsylvania (2004–2010)
Coral Roig-Silva, E. Terrence Slonecker, Lesley Milheim, Jesse R. Ballew, S. Gail Winters
2016, Journal of Maps (12) 131-138
The state of Pennsylvania has a long history of oil and gas extraction. In recent years with advances in technology such as hydraulic fracturing, hydrocarbon sources that were not profitable in the past are now being exploited. Here, we present an assessment of the cumulative impact of oil and gas...
Proposed Auxiliary Boundary Stratigraphic Section and Point (ASSP) for the base of the Ordovician System at Lawson Cove, Utah, USA
James F. Miller, Kevin R. Evans, Raymond L. Ethington, Rebecca Freeman, James D. Loch, John E. Repetski, Robert Ripperdan, John F. Taylor
2016, Stratigraphy (12) 219-236
The Global boundary Stratotype Section and Point (GSSP) for the base of the Ordovician System is at the First Appearance Datum (FAD) of the conodont Iapetognathus fluctivagus at Green Point in Newfoundland, Canada. Strata there are typical graptolitic facies that were deposited near the base of the continental slope.We propose...
Geochemical evidence for seasonal controls on the transportation of Holocene loess, Matanuska Valley, southern Alaska, USA
Daniel R. Muhs, James R. Budahn, Gary L. Skipp, John McGeehin
2016, Aeolian Research (21) 61-73
Loess is a widespread Quaternary deposit in Alaska and loess accretion occurs today in some regions, such as the Matanuska Valley. The source of loess in the Matanuska Valley has been debated for more than seven decades, with the Knik River and the Matanuska River, both to the east, being...
Variability in rainfall at monitoring stations and derivation of a long-term rainfall intensity record in the Grand Canyon Region, Arizona, USA
Joshua J. Caster, Joel B. Sankey
2016, Scientific Investigations Report 2016-5012
In this study, we examine rainfall datasets of varying temporal length, resolution, and spatial distribution to characterize rainfall depth, intensity, and seasonality for monitoring stations along the Colorado River within Marble and Grand Canyons. We identify maximum separation distances between stations at which rainfall measurements might be most useful...
Revisions to the original extent of the Devonian Shale-Middle and Upper Paleozoic Total Petroleum System
Catherine B. Enomoto, William A. Rouse, Michael H. Trippi, Debra K. Higley
2016, Open-File Report 2016-1018
Technically recoverable undiscovered hydrocarbon resources in continuous accumulations are present in Upper Devonian and Lower Mississippian strata in the Appalachian Basin Petroleum Province. The province includes parts of New York, Pennsylvania, Ohio, Maryland, West Virginia, Virginia, Kentucky, Tennessee, Georgia, and Alabama. The Upper Devonian and Lower Mississippian strata are part...
Debris flow occurrence and sediment persistence, Upper Colorado River Valley, CO
Kyle J Grimsley, Sara L. Rathburn, Jonathan M. Friedman, Joseph F. Mangano
2016, Environmental Management (58) 76-92
Debris flow magnitudes and frequencies are compared across the Upper Colorado River valley to assess influences on debris flow occurrence and to evaluate valley geometry effects on sediment persistence. Dendrochronology, field mapping, and aerial photographic analysis are used to evaluate whether a 19th century earthen, water-conveyance ditch has altered the...
Tomographic Rayleigh-wave group velocities in the Central Valley, California centered on the Sacramento/San Joaquin Delta
Jon Peter B. Fletcher, Jemile Erdem, Kevin Seats, Jesse Lawrence
2016, Journal of Geophysical Research B: Solid Earth (121) 2429-2446
If shaking from a local or regional earthquake in the San Francisco Bay region were to rupture levees in the Sacramento/San Joaquin Delta then brackish water from San Francisco Bay would contaminate the water in the Delta: the source of fresh water for about half of California. As a prelude...
Potentiometric surfaces, summer 2013 and winter 2015, and select hydrographs for the Southern High Plains aquifer, Cannon Air Force Base, Curry County, New Mexico
Jake Collison
2016, Scientific Investigations Map 3352
Cannon Air Force Base (Cannon AFB) is located in the High Plains physiographic region of east-central New Mexico, about 5 miles west of Clovis, New Mexico. The area surrounding Cannon AFB is primarily used for agriculture, including irrigated cropland and dairies. The Southern High Plains aquifer is the principal source...
Temporal trends and stationarity in annual peak flow and peak-flow timing for selected long-term streamflow-gaging stations in or near Montana through water year 2011: Chapter B in Montana StreamStats
Steven K. Sando, Peter McCarthy, Roy Sando, DeAnn M. Dutton
2016, Scientific Investigations Report 2015-5019-B
A large-scale study by the U.S. Geological Survey, in cooperation with the Montana Department of Transportation and the Montana Department of Natural Resources and Conservation, was done to investigate general patterns in peak-flow temporal trends and stationarity through water year 2011 for 24 long-term streamflow-gaging stations (hereinafter referred to as...
A multiagency and multijurisdictional approach to mapping the glacial deposits of the Great Lakes region in three dimensions
Richard C. Berg, Steven E. Brown, Jason F. Thomason, Nancy R. Hasenmueller, Sally L. Letsinger, Kevin A. Kincare, John M. Esch, Alan E. Kehew, Harvey Thorleifson, Andrew Kozlowski, Brian C. Bird, Richard R. Pavey, Andy F. Bajc, Abigail K. Burt, Gary M. Fleeger, Eric C. Carson
2016, GSA Special Papers (520) 415-447
The Great Lakes Geologic Mapping Coalition (GLGMC), consisting of state geological surveys from all eight Great Lakes states, the Ontario Geological Survey, and the U.S. Geological Survey, was conceived out of a societal need for unbiased and scientifically defensible geologic information on the shallow subsurface, particularly the delineation, interpretation, and...
Population size and stopover duration estimation using mark–resight data and Bayesian analysis of a superpopulation model
James E. Lyons, William L. Kendall, J. Andrew Royle, Sarah J. Converse, Brad A. Andres, Joseph B. Buchanan
2016, Biometrics (72) 262-271
We present a novel formulation of a mark–recapture–resight model that allows estimation of population size, stopover duration, and arrival and departure schedules at migration areas. Estimation is based on encounter histories of uniquely marked individuals and relative counts of marked and unmarked animals. We use a Bayesian analysis of a...
